interfaces: convert to newwanip_map

One of the nice things is that we don't have to do the global
loop but get all of the information across at once even if
individual listeners will still loop over it if necessary.

src/www/interfaces.php

@@ -576,9 +576,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
 
                 system_routing_configure();
                 filter_configure();
-                foreach ($toapplylist as $ifapply => $ifcfgo) {
-                    plugins_configure('newwanip', false, [$ifapply]);
-                }
+                plugins_configure('newwanip_map', false, [join(',', array_keys($toapplylist))]);
                 rrd_configure();
             }